From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/m68k/__longjmp.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 sysdeps/m68k/__longjmp.c (limited to 'sysdeps/m68k/__longjmp.c') diff --git a/sysdeps/m68k/__longjmp.c b/sysdeps/m68k/__longjmp.c new file mode 100644 index 0000000000..4fc61084a0 --- /dev/null +++ b/sysdeps/m68k/__longjmp.c @@ -0,0 +1,56 @@ +/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include + +/* Jump to the position specified by ENV, causing the + setjmp call there to return VAL, or 1 if VAL is 0. */ +void +__longjmp (__jmp_buf env, int val) +{ + /* This restores the FP and SP that setjmp's caller had, + and puts the return address into A0 and VAL into D0. */ + +#if defined(__HAVE_68881__) || defined(__HAVE_FPU__) + /* Restore the floating-point registers. */ + asm volatile("fmovem%.x %0, fp0-fp7" : + /* No outputs. */ : "g" (env[0].__fpregs[0]) : + "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7"); +#endif + + /* Put VAL in D0. */ + asm volatile("move%.l %0, d0" : /* No outputs. */ : + "g" (val == 0 ? 1 : val) : "d0"); + + asm volatile(/* Restore the data and address registers. */ + "movem%.l %0, d1-d7/a0-a7\n" + /* Return to setjmp's caller. */ +#ifdef __motorola__ + "jmp (a0)" +#else + "jmp a0@" +#endif + : /* No outputs. */ : "g" (env[0].__dregs[0]) + /* We don't bother with the clobbers, + because this code always jumps out anyway. */ + ); + + /* This call avoids `volatile function does return' warnings. */ + abort (); +} -- cgit v1.2.3